In the stock market, fund market, bond market, gold market and futures market (collectively referred to as "derivative financial instruments market"), we can often see many ratios, which determine the survival of enterprises, the value and return of venture capital, and even the economic situation of the country. Many of these ratios are what we call "AB ratio" in economics.

Financial analysis indicators use data as the language to convey financial information and explain financial activities and results in a concise form. The financial indicators established here are different from the national assessment regulations for enterprise work. It involves a wide range of financial activities of enterprises, including a large number of indicators, while the assessment indicators stipulated by the state focus on key points and selectively stipulate some indicators, which are divided into external analysis index system and internal analysis index system.